Circularly polarized light-emitting perovskite quantum dot and preparation method thereof

The invention discloses a chiral core-shell perovskite quantum dot with circular polarization luminescence performance and a preparation method thereof. According to the method, chiral low-dimensional perovskite is used as a chiral shell layer, and achiral 3D high-dimensional perovskite ABX3 is used as a light-emitting core. Based on chiral induced spin selectivity, a chiral shell layer is used as a spin filtering layer to generate spin electrons and inject the spin electrons into a three-dimensional light-emitting core, so that the core is endowed with a spin polarization characteristic, the structural symmetry and high light-emitting performance of the core are kept, and the circularly polarized light-emitting property is realized. The preparation method of the circularly polarized light-emitting perovskite quantum dot based on the chiral core-shell structure provided by the invention is simple to operate, and a brand new solution is provided for the field of perovskite circularly polarized light emitting.